Oil gauge



Jan. 16, 1940. J. H. CADDELL 2,187,300

OIL GAUGE Filed March 28, 1959 ii 6 K BYM ATTORNEYS.

Patented Jan. t

PATENT OFFICEv 2,1s7,3oo f,

p on. GAuGE c c James n. ,Caddell, Richnicnd, va,

mitati n mam, in es! No. 264,645

2 Claims. o1;':e+a16) This invention relates to liquid gauges designed.

primarily for use in connection with fuel oil tanks, the primary object of the invention being to provide a gauge which may be positioned at a point remoteirom 'the tank, for indicating the oil level in the tank, 3 c An important object of the invention is to provide a gauge of this characterwhich maynbe readily and easily positioned in the usual thread- 10 ed opening of oil tanks designed for containing fuel oil,in lieu of the usual threaded plug which normally closes the opening, through which a gauge stick is positioned to determine the level of the fuelroilin the tank.

15 Another important object of the invention is to provide a fitting which may be positioned for i the true operation of the float, forming a part of the gauge structure, the securing means operatc ving independentlyof the supporting plug to which z the floatand float supporting rod are secured,

to the end that the device may be secured without varying the adjusted position of the supporting plug, insuring theitrue operation of the float.

With the foregoing and other objects in view,

which will appear asthe description proceeds, the c invention resides in the combination and arrangement of parts. and in the details of construction hereinafterde scribed and claimed, it being understood that changesin the precise .30 embodiment of the invention herein described,

may be made within the scopeof what is claimed, without departing from the spirit of the invention, i

Referring to, the drawing:

35 Figure l isa sectional view through a fuel oil tank showing a fitting, constructed in accordance with the invention, as positioned in the tank, and

illustrating the relation of thegauge proper, with l the fitting and tank.

, Figure 2 is an enlarged sectional view through the fitting.

Referring toithe drawing in detail, thereference character 5 designates a fuel oil tank, which is same being formed with a threaded opening in which the usual plug is positioned to close the opening, the plug being removable when it is desired to position, a gauge stick, in the, tank, to,

tioned, without the necessityof making alteraof the usual and well known construction the tins in the tank construction, to mount the gauge.

the present showing, the gauge includes a supporting plug 6 which is circular in cross seci This plug 6 provides a support for the rod 8,

which is shown as threaded in an opening in the bottom of the plug, the rod 8 providing the support for the float rod 9 carrying the float l0 at the free end thereof. Brackets indicated at II are secured to the rod 8 and have bearings i2 through which the piston rod l3 moves, the piston 5 rod being pivotally connected with the float rod 9, through the link l4.

, The reference character I5 designates a cylinder which is formed with threads positioned in a threaded opening of the plug 6, the cylinder being of a'length to extend an appreciable distance above the nut 1. Carried on the upper end of the piston rod [3, is a piston l6, which operates in the cylinder I5. A nut indicated at I! is posittioned on the threaded lower end of the cylinder i I 5 andengages the nut 1, drawing the plug into close engagement with the nut T, and supporting the plug in proper position.

Theupper end of the cylinder I5 is threaded to receive the threaded sleeve I8 into which the coupling l9 which couples the pipe 20 to the fitting, is" extended.

The pipe .20, may be of any desired length,

the pipe extending to a point remote from the tank ,5, or to apoint for convenience in reading the gauge. "The gauge proper, is indicated by the reference character 2| and includes the ,usual gauge tube 22, the edge of the gauge being graduated, so that areading of the fluid level i in the gauge, may be accurately made. 1 A suitable 4o fluid is of course housed in the cylinder l5,-pipe 20 and gauge tube 22, with the result that as the float I0 is elevated by the filling of the tank 5, the piston IE will move upwardly, forcing the fluid, which in the present showing is indicated {at 23, upwardly in the pipe 2|], and of course changing the liquid level in the gauge 22.

As the float In is lowered, due to the lowering of the oil level in the tank 5, the piston IE will move downwardly causing the fluid level in the gauge 22 to lower, indicating the oil level in, the

tank.

From the foregoing it will be seen that due to the construction of the fitting, the plug 6 may be 1. A liquid level gauge for tanks, comprising.

a fitting including a plug, a nut fitted over the plug and adapted to be threaded in an opening of the tank, a cylinder rising from the plug, a nut on the cylinder cooperating withthe plug in clamping the plug to the first said nut, a; gauge tube, a pipe establishing communication between the gauge tube and fitting, and means including a piston and float for controlling the liquid level in the gauge tube.

2. In a fluid gauge for tanks, a plug, a cylinder extending upwardly from the plug, a nut positioned on the plug and rotatable independently of the plug and adapted to be positioned in an opening of a tank, a nut positioned on the cylinder and adapted to draw the plug into close engagement with the first mentioned nut, a sup porting. rod secured to the plug, a piston rod operating through the plug, a piston on one end of the piston rod and operating in the cylinder, a gauge including a gauge pipe connected with the cylinder and in which liquid is held, and a float pivotally mounted on the lower end of the JAMES H. CADDELL. 

